The invention relates to a device for continuously sorting a particulate stream, comprising: a) a conveyor (1) for conveying the particulate stream to a separation device, b) a sieve (7) for separating the particulate stream according to size, characterized in that it further comprises c) a pre-sieve (3) comprising elongated sieve openings located between the conveyor outlet and the sieve d)and a mechanical impact device for providing mechanical impacts to the pre-sieve (3). The pre-sieve allows to separate elongated objects like threads or wires from the particulate stream which would otherwise clog or block subsequent separation devices including the sieve.
B07B 13/00 - Grading or sorting solid materials by dry methods, not otherwise provided forSorting articles otherwise than by indirectly controlled devices
B07B 13/07 - Apparatus in which aggregates or articles are moved along or past openings which increase in size in the direction of movement
B03B 9/04 - General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags
The invention relates to a device for continuously sorting a particulate stream, comprising: a) a screw conveyor (1) for conveying the particulate stream to a separation device, b) a sieve (7) for separating the particulate stream ac cording to size, characterized in that it further comprises c) a pre-sieve (3) comprising elongated sieve openings formed by fingers extending towards an end portion of the pre-sieve with the tips of the fingers not being connected in that end portion, the pre-sieve (3) being located between the conveyor outlet and the sieve, d) wherein the pre-sieve (3) encloses part of the circumference of the conveyor screw in an axial end portion of the conveyor screw, and e) the radial distance between the conveyor screw (1) and the pre-sieve (3) is less than 10%, preferably less than 5% of the conveyor screw diameter. The pre-sieve allows to separate elongated objects like threads or wires from the particulate stream which would otherwise clog or block subsequent separation devices including the sieve.
B07B 13/00 - Grading or sorting solid materials by dry methods, not otherwise provided forSorting articles otherwise than by indirectly controlled devices
B07B 13/07 - Apparatus in which aggregates or articles are moved along or past openings which increase in size in the direction of movement
B03B 9/04 - General arrangement of separating plant, e.g. flow sheets specially adapted for furnace residues, smeltings, or foundry slags
The invention relates to a method for starting up a fluidized bed boiler, such as a circulating fluidized bed (CFB) or a bubbling fluidized bed (BFB) boiler, for operation with a predetermined concentration of ilmenite particles in the bed material. The invention also relates to a method for pre-oxidizing ilmenite, to pre-oxidized ilmenite and to the use of pre-oxidized ilmenite in a fluidized bed boiler.
The invention relates to a method for operating a fluidized bed boiler, comprising the combustion of solid fuel, and carrying out the combustion process with a fluidized bed comprising ilmenite particles, characterized in that the bed temperature of the fluidized bed is between 900°C and 1,000°C.
F23C 10/10 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
F23C 10/26 - Devices for removal of material from the bed combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts
5.
System and process for recycling fluidized boiler bed material
The invention relates to a system for recycling fluidized bed boiler bed material, comprising: a. a bottom ash removal device for removing bed material from a fluidized bed boiler, b. a mechanical classifier (10) comprising a mesh size from 200 to 1,000 μm designed to separate a coarse and a fine particle size fraction, c. a magnetic separator (12) designed to magnetically classify the fine particle fraction from the mechanical classifier, d. a device for recirculating the magnetic particle fraction into the boiler. The invention allows effective recirculation and reuse of ilmenite bed material.
F23J 3/06 - Systems for accumulating residues from different parts of furnace plant
F23C 10/01 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles in a fluidised bed of catalytic particles
F23C 10/26 - Devices for removal of material from the bed combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts
The invention relates to a method for operating a fluidized bed boiler (6), comprising the steps of: a) providing fresh ilmenite particles having a shape factor of 0.8 or lower as bed material to the fluidized bed boiler (6); b) carrying out a fluidized bed combustion process; c) removing at least one ash stream comprising ilmenite particles from the fluidized bed boiler; d) separating ilmenite particles from the at least one ash stream, wherein the separation includes a step of using a magnetic separator (12) comprising a field strength of 2,000 Gauss or more; e) recirculating separated ilmenite particles into the bed of the fluidized bed boiler; wherein the average residence time of ilmenite particles in the fluidized bed is 100 h or more.
F22B 31/00 - Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatusArrangements or dispositions of combustion apparatus
F23C 10/26 - Devices for removal of material from the bed combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts
B03C 1/12 - Magnetic separation acting directly on the substance being separated with cylindrical material carriers with magnets moving during operationMagnetic separation acting directly on the substance being separated with cylindrical material carriers with movable pole pieces
B03C 1/30 - Combinations with other devices, not otherwise provided for
F23C 10/01 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles in a fluidised bed of catalytic particles
F23C 10/02 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
F23G 5/30 - Methods or apparatus, e.g. incinerators, specially adapted for combustion of waste or low-grade fuels with combustion in a fluidised bed
7.
Use of pre-oxidized ilmenite in fluidized bed boilers
The invention relates to a method for starting up a fluidized bed boiler, such as a circulating fluidized bed (CFB) or a bubbling fluidized bed (BFB) boiler, for operation with a predetermined concentration of ilmenite particles in the bed material. The invention also relates to a method for pre-oxidizing ilmenite, to pre-oxidized ilmenite and to the use of pre-oxidized ilmenite in a fluidized bed boiler.
The invention relates to abed management cycle for a fluidized bed boiler, comprising the steps of: a) providing fresh ilmenite particles as bed material to the fluidized bed boiler; b) carrying out a fluidized bed combustion process; c) removing at least one ash stream comprising ilmenite particles from the fluidized bed boiler; d) separating ilmenite particles from the at least one ash stream; e) recirculating separated ilmenite particles into the bed of the fluidized bed boiler. The invention also relates to a corresponding arrangement for carrying out fluidized bed combustion, comprising a fluidized bed boiler comprising ilmenite particles as bed material; and a system for removing ash from the fluidized bed boiler; wherein the arrangement further comprises a separator for separating ilmenite particles from the re-moved ash; and means for recirculating separated ilmenite particles into the bed of the fluidized bed boiler.
F23C 10/26 - Devices for removal of material from the bed combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts
F23C 10/32 - Control devices specially adapted for fluidised bed combustion apparatus for controlling the level of the bed or the amount of material in the bed by controlling the rate of recirculation of particles separated from the flue gases
F23C 10/00 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles
01 - Chemical and biological materials for industrial, scientific and agricultural use
11 - Environmental control apparatus
37 - Construction and mining; installation and repair services
41 - Education, entertainment, sporting and cultural services
Goods & Services
Industrial minerals, powdered minerals for industrial use; oxygen absorbing materials for industrial use in combustion for heating use, sand and mineral mixes for oxygen absorbency in combustion for heating use; catalysts for use in combustion for heating use, sand and mineral mixes for use as catalysts in combustion for heating use. Burners, furnaces and boilers; industrial furnaces; furnaces for use in heating systems and heating installations; fluidized bed combustion boilers, apparatus for fluidized bed combustion boilers, namely bed material with oxygen absorbence capacity, for heating boilers. Entrepreneurial services in heating and warming; installation, maintenance and operational optimization of heating boilers; consultation regarding installation, maintenance and operational optimization of heating boilers. Education in heating and warming, education in installation, maintenance and operational optimization of heating boilers.
The invention relates to a method for operating a fluidized bed boiler (6), comprising the steps of: a) providing fresh ilmenite particles having a shape factor of 0.8 or lower as bed material to the fluidized bed boiler (6); b) carrying out a fluidized bed combustion process; c) removing at least one ash stream comprising ilmenite particles from the fluidized bed boiler; d) separating ilmenite particles from the at least one ash stream, wherein the separation includes a step of using a magnetic separator (12) comprising a field strength of 2,000 Gauss or more; e) recirculating separated ilmenite particles into the bed of the fluidized bed boiler; wherein the average residence time of ilmenite particles in the fluidized bed is 100 h or more.
F23C 10/02 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
F23C 10/26 - Devices for removal of material from the bed combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts
F23G 5/30 - Methods or apparatus, e.g. incinerators, specially adapted for combustion of waste or low-grade fuels with combustion in a fluidised bed
B03C 1/12 - Magnetic separation acting directly on the substance being separated with cylindrical material carriers with magnets moving during operationMagnetic separation acting directly on the substance being separated with cylindrical material carriers with movable pole pieces
B03C 1/14 - Magnetic separation acting directly on the substance being separated with cylindrical material carriers with non-movable magnets
11.
SYSTEM AND PROCESS FOR RECYCLING FLUIDIZED BOILER BED MATERIAL
The invention relates to a system for recycling fluidized bed boiler bed material, comprising: a. a bottom ash removal device for removing bed material from a fluidized bed boiler, b. a mechanical classifier (10) comprising a mesh size from 200 to 1,000 μm designed to separate a coarse and a fine particle size fraction, c. a magnetic separator (12) designed to magnetically classify the fine particle fraction from the mechanical classifier, d. a device for recirculating the magnetic particle fraction into the boiler. The invention allows effective recirculation and reuse of ilmenite bed material.
F23C 10/26 - Devices for removal of material from the bed combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts
F23J 3/06 - Systems for accumulating residues from different parts of furnace plant
F23C 10/01 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles in a fluidised bed of catalytic particles
The invention relates to a method for operating a fluidized bed boiler, comprising carrying out the combustion process with a fluidized bed comprising ilmenite particles, wherein the average residence time of the ilmenite particles in the boiler is at least 75 hours. The invention further relates to ilmenite particles obtainable by a corresponding method and the use of said ilmenite particles as oxygen-carrying material.
F23C 10/02 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
F23C 10/32 - Control devices specially adapted for fluidised bed combustion apparatus for controlling the level of the bed or the amount of material in the bed by controlling the rate of recirculation of particles separated from the flue gases
F23C 10/00 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles
The invention relates to a method for operating a fluidized bed boiler, comprising: a) setting the ratio of secondary oxygen containing gas to primary oxygen containing fluidizing gas to a value ranging from 0.0 to 0.8; b) carrying out the combustion of fuel with a fluidized bed comprising ilmenite particle; and to a fluidized bed boiler.
F23C 10/10 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone characterised by the arrangement of separation apparatus, e.g. cyclones, for separating particles from the flue gases the separation apparatus being located outside the combustion chamber
F23G 5/30 - Methods or apparatus, e.g. incinerators, specially adapted for combustion of waste or low-grade fuels with combustion in a fluidised bed
F23C 10/18 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles DetailsAccessories
The invention is in the field of boiler control and relates to a control method for the operation of a combustion boiler, comprising providing a predetermined upper limit (VF,max) for the flue gas velocity in at least one location of the boiler; monitoring the flue gas velocity (VF) during the combustion of fuel in said at least one location of the boiler; comparing the flue gas velocity (VF) with the predetermined upper limit (VF,max); decreasing the thermal load of the boiler if the flue gas velocity exceeds the predetermined upper limit (VF,max). The invention also relates to a control system configured to execute the control method.
The invention is in the technical field of bubbling fluidized bed combustion and relates to the use of ilmenite particles with an average particle size between 0.1 mm and 1.8 mm as bed material for a bubbling fluidized bed (BFB) boiler with an excess air ratio (λ) below 1.3 and to a method for operating a bubbling fluidized bed (BFB) boiler, comprising carrying out the combustion process with a bubbling fluidized bed comprising ilmenite particles as defined in any one of claims 1 and 4-5; and setting the excess air ratio (λ) to a value below 1.3.
F23C 10/00 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles
F23C 10/20 - Inlets for fluidisation air, e.g. gridsBottoms
F23G 5/30 - Methods or apparatus, e.g. incinerators, specially adapted for combustion of waste or low-grade fuels with combustion in a fluidised bed
F23C 10/18 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles DetailsAccessories
F23C 10/12 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated exclusively within the combustion zone
The invention relates to a method for operating a fluidized bed boiler, comprising carrying out the combustion process with a fluidized bed comprising ilmenite particles, wherein the average residence time of the ilmenite particles in the boiler is at least 75 hours. The invention further relates to ilmenite particles obtainable by a corresponding method and the use of said ilmenite particles as oxygen-carrying material.
F23C 10/00 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles
F23C 10/02 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
F23C 10/32 - Control devices specially adapted for fluidised bed combustion apparatus for controlling the level of the bed or the amount of material in the bed by controlling the rate of recirculation of particles separated from the flue gases
17.
BED MANAGEMENT CYCLE FOR A FLUIDIZED BED BOILER AND CORRESPONDING ARRANGEMENT
The invention relates to abed management cycle for a fluidized bed boiler, comprising the steps of: a) providing fresh ilmenite particles as bed material to the fluidized bed boiler; b) carrying out a fluidized bed combustion process; c) removing at least one ash stream comprising ilmenite particles from the fluidized bed boiler; d) separating ilmenite particles from the at least one ash stream; e) recirculating separated ilmenite particles into the bed of the fluidized bed boiler. The invention also relates to a corresponding arrangement for carrying out fluidized bed combustion, comprising a fluidized bed boiler comprising ilmenite particles as bed material; and a system for removing ash from the fluidized bed boiler; wherein the arrangement further comprises a separator for separating ilmenite particles from the re- moved ash; and means for recirculating separated ilmenite particles into the bed of the fluidized bed boiler.
F23C 10/00 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles
F23C 10/26 - Devices for removal of material from the bed combined with devices for partial reintroduction of material into the bed, e.g. after separation of agglomerated parts
F23C 10/32 - Control devices specially adapted for fluidised bed combustion apparatus for controlling the level of the bed or the amount of material in the bed by controlling the rate of recirculation of particles separated from the flue gases
18.
USE OF PRE-OXIDIZED ILMENITE IN FLUIDIZED BED BOILERS
The invention relates to a method for starting up a fluidized bed boiler, such as a circulating fluidized bed (CFB) or a bubbling fluidized bed (BFB) boiler, for operation with a predetermined concentration of ilmenite particles in the bed material. The invention also relates to a method for pre-oxidizing ilmenite, to pre-oxidized ilmenite and to the use of pre-oxidized ilmenite in a fluidized bed boiler.
The invention relates to a method for operating a fluidized bed boiler, comprising: a) setting the ratio of secondary oxygen containing gas to primary oxygen containing fluidizing gas to a value ranging from 0.0 to 0.8; b) carrying out the combustion of fuel with a fluidized bed comprising ilmenite particle; and to a fluidized bed boiler.
F23G 5/30 - Methods or apparatus, e.g. incinerators, specially adapted for combustion of waste or low-grade fuels with combustion in a fluidised bed
F23C 10/12 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated exclusively within the combustion zone
F23C 10/18 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles DetailsAccessories
The invention is in the field of boiler control and relates to a control method for the operation of a combustion boiler, comprising providing a predetermined upper limit (VF,max) for the flue gas velocity in at least one location of the boiler; monitoring the flue gas velocity (VF) during the combustion of fuel in said at least one location of the boiler; comparing the flue gas velocity (VF) with the predetermined upper limit (VF,max); decreasing the thermal load of the boiler if the flue gas velocity exceeds the predetermined upper limit (VF,max). The invention also relates to a control system configured to execute the control method.
The invention is in the technical field of bubbling fluidized bed combustion and relates to the use of ilmenite particles with an average particle size between 0.1 mm and 1.8 mm as bed material for a bubbling fluidized bed (BFB) boiler with an excess air ratio (λ) below 1.3 and to a method for operating a bubbling fluidized bed (BFB) boiler, comprising carrying out the combustion process with a bubbling fluidized bed comprising ilmenite particles as defined in any one of claims 1 and 4-5; and setting the excess air ratio (λ) to a value below 1.3.
F23G 5/30 - Methods or apparatus, e.g. incinerators, specially adapted for combustion of waste or low-grade fuels with combustion in a fluidised bed
F23C 10/12 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated exclusively within the combustion zone
F23C 10/18 - Apparatus in which combustion takes place in a fluidised bed of fuel or other particles DetailsAccessories
01 - Chemical and biological materials for industrial, scientific and agricultural use
11 - Environmental control apparatus
37 - Construction and mining; installation and repair services
41 - Education, entertainment, sporting and cultural services
Goods & Services
Industrial minerals, powdered minerals for industrial use; oxygen absorbing materials for industrial use in combustion for heating use, sand and mineral mixes for oxygen absorbency in combustion for heating use; catalysts for use in combustion for heating use, sand and mineral mixes for use as catalysts in combustion for heating use. Burners, furnaces and boilers; industrial furnaces; furnaces for use in heating systems and heating installations; fluidized bed combustion boilers, apparatus for fluidized bed combustion boilers, namely bed material with oxygen absorbence capacity, for heating boilers. Entrepreneurial services in heating and warming; installation, maintenance and operational optimization of heating boilers; consultation regarding installation, maintenance and operational optimization of heating boilers. Education in heating and warming, education in installation, maintenance and operational optimization of heating boilers.
